title: Preliminary crystallographic investigation of the protein toxin from corynebacterium diphtheriae.
abstract: Crystals of diphtheria toxin have been obtained in vapor diffusion experiments from concentrated solutions of potassium tartrate as the precipitating agent. The crystals are trigonal with unit cell dimensions a = b = 97.90 A and c = 100.30 A. The space group is P31 12 or its enantiomorph. The unit cell contains 6 molecules of molecular weight 62,000 with 1 molecule/asymmetric unit. The crystals diffract beyond 2.8 A resolution and are able to withstand more than 100 h of x-ray exposure. The complete structure analysis is in progress.
mesh_terms: D003353:Corynebacterium diphtheriae / Q000032:analysis*; D003460:Crystallization; D004167:Diphtheria Toxin / Q000302:isolation & purification*; D011487:Protein Conformation; D014961:X-Ray Diffraction
chemical_list: D004167:Diphtheria Toxin